Philadelphia is the largest city in Pennsylvania and the sixth-most-populous city in the United States. It is the fifth-largest metropolitan area and fourth-largest urban area by population in the United States, the nation's fourth-largest consumer media market as ranked by the Nielsen Media Research, and the 49th-most-populous city in the world. It is 9th richest city in the world based on GDP figures. It is the county seat of Philadelphia County (with which it is coterminous). A popular nickname for Philadelphia is The City of Brotherly Love, "brotherly love" from philos, "love", and adelphos "brother"). It is commonly and informally referred to as Philly. The city is recognized as a strong candidate global city.
